colour.colorimetry.whiteness_Taube1960#

colour.colorimetry.whiteness_Taube1960(XYZ: ArrayLike, XYZ_0: ArrayLike) NDArrayFloat[source]#

Return the whiteness index \(WI\) of given sample CIE XYZ tristimulus values using Taube (1960) method.

Parameters:
  • XYZ (ArrayLike) – CIE XYZ tristimulus values of the sample.

  • XYZ_0 (ArrayLike) – CIE XYZ tristimulus values of the reference white.

Returns:

Whiteness \(WI\).

Return type:

np.float or numpy.ndarray

Notes

Domain

Scale - Reference

Scale - 1

XYZ

[0, 100]

[0, 1]

XYZ_0

[0, 100]

[0, 1]

Range

Scale - Reference

Scale - 1

WI

[0, 100]

[0, 1]

  • Whiteness \(WI\) values larger than 100 indicate a bluish white and values smaller than 100 indicate a yellowish white.

References

[XRitePantone12]

Examples

>>> import numpy as np
>>> XYZ = np.array([95.00000000, 100.00000000, 105.00000000])
>>> XYZ_0 = np.array([94.80966767, 100.00000000, 107.30513595])
>>> whiteness_Taube1960(XYZ, XYZ_0)  
91.4071738...